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Leon Fisk Leon Fisk is offline
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Default Yankee push drill #50 three jaw chuck dis-assembly.

On Tue, 8 May 2012 22:12:19 -0400
"Machinist60" wrote:

big snip
Turns out that the screw inside the chuck is right handed and was not at all
tight after a little heat. The jamming turned out to be galling in the main
chuck thread when a bit of debris got in. It was a very tight fitting
thread so I cut the male section a little deeper and now all is well. The
assembly of the jaws inside the chuck is still a mystery to me, the parts D,
b and I do not come out, the body must be pressed together but I cannot tell
exactly where.

Any ways it will function and thanks for your help and enlightening
discussion everyone.


Nice to read your follow-up and that surgery was successful

I try to quit while I'm ahead nowadays... been burned too many times
trying to get that last little bit of something apart and then end up
ruining said item. Curiosity can be a two-bladed sword for sure.

In reading the info for patent 693,256 I began to wonder what kept parts
C and F from working loose during use. I suspect that was a problem in
design or I misunderstood something. There was a comment in the text
near line 75 saying that "The sleeve (F) is forced tightly against the
flange c of the ring C, so that the ring and sleeve move as a unit."
Your picture didn't look the same in that area, no flange on c. I
suspect the parts separate in that area, but if you got it working
without going any farther I would think it prudent to call it good, as
you did ;-)

--
Leon Fisk
Grand Rapids MI/Zone 5b
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